Chair arm



FIG. 1 is a perspective view showing the top, left side and front of a chair arm which forms my new design, the broken lines of a chair being for illustrative purposes only and forming no part of my design;

FIG. 2 is an enlarged left side elevational view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged right side elevational view thereof;

FIG. 5 is an enlarged bottom plan view thereof;

FIG. 6 is an enlarged front elevational view thereof;

FIG. 7 is an enlarged rear elevational view thereof; and,

FIG. 8 is an enlarged perspective view showing the top, left side and front thereof. 

The ornamental design for a chair arm, as shown and described. 